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Get nth character of a string in Swift programming language
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Why is this not built-in?
The error message says "see the documentation comment for discussion". Apple provides the following explanation in the file UnavailableStringAPIs.swift:
Subscripting strings with integers is not available.
The concept of "the ith character in a string" has
dif...
How to call a Parent Class's method from Child Class in Python?
... for calling parent method.
If Foo class inherits from Bar, then from Bar.__init__ can be invoked from Foo via super().__init__():
class Foo(Bar):
def __init__(self, *args, **kwargs):
# invoke Bar.__init__
super().__init__(*args, **kwargs)
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Looping through localStorage in HTML5 and JavaScript
... from code execution. And often, it's also much faster. See blog.mozilla.com/webdev/2009/02/12/native-json-in-firefox-31
– Matthew Flaschen
Jun 29 '10 at 21:53
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What does the brk() system call do?
...ld crash immediately.
I'm not sure where the number 512GB in this diagram comes from. It implies a 64-bit virtual address space, which is inconsistent with the very simple memory map you have there. A real 64-bit address space looks more like this:
Legend: t: text, d: data, b: B...
Circle line-segment collision detection algorithm?
...dy - dxh - dyk ) +
ex2 + ey2 -
2exh - 2eyk + h2 + k2 - r2 = 0
Finally,
t2( _d * _d ) + 2t( _e * _d - _d * _c ) + _e * _e - 2( _e*_c ) + _c * _c - r2 = 0
*Where _d is the vector d and * is the dot product.*
And then,
t2( _d * _d ) + 2t( _d * ( _e - _c ) ) + ( _e - _c ) * ( _e - _c ) - r2 = 0
Letting...
How to call Stored Procedure in Entity Framework 6 (Code-First)?
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This article maybe helpful blogs.msdn.com/b/diego/archive/2012/01/10/…
– Alborz
Jan 3 '14 at 20:33
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What's the best way to convert a number to a string in JavaScript? [closed]
...Performance tests here (not by me, but found when I went to write my own):
http://jsben.ch/#/ghQYR
Fastest based on the JSPerf test above: str = num.toString();
It should be noted that the difference in speed is not overly significant when you consider that it can do the conversion any way 1 Milli...
How to avoid circular imports in Python? [duplicate]
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Doesn't seem to work with submodules import foobar.mod_a and import foobar.mod_b doesn't work like described above.
– Nick
Oct 2 '13 at 0:39
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Add single element to array in numpy
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Try this:
np.concatenate((a, np.array([a[0]])))
http://docs.scipy.org/doc/numpy/reference/generated/numpy.concatenate.html
concatenate needs both elements to be numpy arrays; however, a[0] is not an array. That is why it does not work.
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MDI CDockablePane使用总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...架类的头文件中定义一个CDockablePane的数组
CDockablePane m_Panes[5];//一个CDockablePane的数组
2. CFrameWndEx:: OnCreate() 在Create函数中自动生成了以下代码，对MFC比较熟悉的这里就不讲了：
CMFCPopupMenu::SetForceMenuFocus(FALSE);
InitUserToolbars(N...